1. North Bay District Hospital, North Bay; Centre for Minimal Access Surgery, McMaster University, Hamilton, Ontario
2. Centre Hospitalier de la Sagamie, Chicoutimi, Québec, Canada
3. North Bay District Hospital, North Bay
4. Centre for Minimal Access Surgery, McMaster University, Hamilton, Ontario; St. Joseph's Healthcare, 50 Charlton Avenue, East Hamilton, ON L8N 4A6, Canada;